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#1 Phillips screwdriver
} Through careful engineering
Lightweight thru-axles
ample T-channels
Shimano Dura-Ace R9100 55t 110mm Chainring for 55-42t MFPN=670-0307012030 #1 Phillips screwdriverThis Shimano chainring allows you to update your Dura Ace FC R9100 11 speed crankset with a chainring configuration to best fit your riding style. Integrates Shimano Hollowglide Technology: the high rigidity hollow structure cuts down on weight yet maintains strength to provide better power transfer and quicker more precise front shifting Features a weight saving 4 bolt design with a BCD of 110 mm Ring Position Type Outer Tooth Count 55 Drivetrain
